#include "cvc4parser_public.h"

#ifndef __CVC4__PARSER__SMT_INPUT_H
#define __CVC4__PARSER__SMT_INPUT_H

#include "parser/antlr_input.h"
#include "parser/smt/generated/SmtLexer.h"
#include "parser/smt/generated/SmtParser.h"

// extern void SmtParserSetAntlrParser(CVC4::parser::AntlrParser* newAntlrParser);

namespace CVC4 {

class Command;
class Expr;
class ExprManager;

namespace parser {

class SmtInput : public AntlrInput {

  /** The ANTLR3 SMT lexer for the input. */
  pSmtLexer d_pSmtLexer;

  /** The ANTLR3 CVC parser for the input. */
  pSmtParser d_pSmtParser;

public:

  /**
   * Create a file input.
   *
   * @param exprManager the manager to use when building expressions from the input
   * @param filename the path of the file to read
   * @param useMmap <code>true</code> if the input should use memory-mapped
   * I/O; otherwise, the input will use the standard ANTLR3 I/O implementation.
   */
  SmtInput(ExprManager* exprManager, const std::string& filename, bool useMmap);

  /**
   * Create a string input.
   *
   * @param exprManager the manager to use when building expressions from the input
   * @param input the string to read
   * @param name the "filename" to use when reporting errors
   */
  SmtInput(ExprManager* exprManager, const std::string& input, const std::string& name);

  /** Destructor. Frees the lexer and the parser. */
  ~SmtInput();

protected:

  /**
   * Parse a command from the input. Returns <code>NULL</code> if
   * there is no command there to parse.
   *
   * @throws ParserException if an error is encountered during parsing.
   */
  Command* doParseCommand() throw(ParserException);

  /**
   * Parse an expression from the input. Returns a null
   * <code>Expr</code> if there is no expression there to parse.
   *
   * @throws ParserException if an error is encountered during parsing.
   */
  Expr doParseExpr() throw(ParserException);

private:

  /**
   * Initialize the class. Called from the constructors once the input
   * stream is initialized.
   */
  void init();

};/* class SmtInput */

}/* CVC4::parser namespace */
}/* CVC4 namespace */

#endif /* __CVC4__PARSER__SMT_INPUT_H */